import org.eclipse.core.resources.IResourceStatus;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.ui.internal.ide.dialogs.MissingPathVariableDialog;

	private Shell shell;

		shell = parent.getShell();

			validateResourceLinks(workspace, project);

	 * @param workspace

	 * @param project

	 * @throws CoreException

	 */

	private void validateResourceLinks(final IWorkspace workspace,

			final IProject project) throws CoreException {

		final HashSet missingLinks = new HashSet();

		IResource[] projectResources = project.members();

		for (int i = 0; i < projectResources.length; i++) {

			IResource resource = projectResources[i];

			if (resource.isLinked()){

				final IStatus status = workspace.validateLinkLocation(resource, resource.getRawLocation());

				if (IResourceStatus.VARIABLE_NOT_DEFINED_WARNING == status.getCode()){

					missingLinks.add(resource.getRawLocation().segment(0));

				}

			}

		}

		if (!missingLinks.isEmpty()){

			System.out.println("Missing Resource Variables:"); //$NON-NLS-1$

			for (Iterator iterator = missingLinks.iterator(); iterator

					.hasNext();) {

				String missingLink = (String) iterator.next();

				System.out.println(missingLink);

			}

			final MissingPathVariableDialog missingDialog = new MissingPathVariableDialog(shell, ResourcesPlugin.getWorkspace()

	                .getPathVariableManager() ,missingLinks);

			getShell().getDisplay().asyncExec(new Runnable(){

				public void run() {

					missingDialog.open();

				}

			});

		}

	}

	/**

/*******************************************************************************

 * Copyright (c) 2007 IBM Corporation and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *     IBM Corporation - initial API and implementation

 ******************************************************************************/

package org.eclipse.ui.internal.ide.dialogs;

import java.util.Set;

import org.eclipse.core.resources.IPathVariableManager;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.dialogs.IDialogConstants;

import org.eclipse.jface.dialogs.TitleAreaDialog;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.FormAttachment;

import org.eclipse.swt.layout.FormData;

import org.eclipse.swt.layout.FormLayout;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.List;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;

/**

 * @since 3.4

 *

 */

public class MissingPathVariableDialog extends TitleAreaDialog {

	private Set missingNames;

	private IPathVariableManager manager;

	private Label variableNameLabel;

	private List variableNameField;

	private Button okButton;

	/**

	 * @param parentShell

	 */

	public MissingPathVariableDialog(Shell parentShell, IPathVariableManager manager, Set missingNames) {

		super(parentShell);

		this.missingNames = missingNames;

		this.manager = manager;

		this.manager.getPathVariableNames();

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.dialogs.TitleAreaDialog#createDialogArea(org.eclipse.swt.widgets.Composite)

	 */

	protected Control createDialogArea(Composite parent) {

	    // top level composite

	    Composite parentComposite = (Composite) super.createDialogArea(parent);

	    initializeDialogUnits(parentComposite);

	    // creates dialog area composite

	    Composite contents = createComposite(parentComposite);

	    // creates and lay outs dialog area widgets 

	    createWidgets(contents);

	    Dialog.applyDialogFont(parentComposite);

	    return contents;

	}

	/**

	 * Creates and configures this dialog's main composite.

	 * 

	 * @param parentComposite parent's composite

	 * @return this dialog's main composite

	 */

	private Composite createComposite(Composite parentComposite) {

	    // creates a composite with standard margins and spacing

	    Composite contents = new Composite(parentComposite, SWT.NONE);

	    FormLayout layout = new FormLayout();

	    contents.setLayout(layout);

	    contents.setLayoutData(new GridData(GridData.FILL_BOTH));

		setTitle(IDEWorkbenchMessages.PathVariableDialog_dialogTitle_newVariable);

	    setMessage(IDEWorkbenchMessages.PathVariableDialog_message_newVariable);

	    return contents;

	}

	/**

	 * Creates widgets for this dialog.

	 * 

	 * @param contents the parent composite where to create widgets

	 */

	private void createWidgets(Composite contents) {

	    FormData data;

	    String nameLabelText = IDEWorkbenchMessages.PathVariableDialog_variableName;

	    // variable name label

	    variableNameLabel = new Label(contents, SWT.LEFT);

	    variableNameLabel.setText(nameLabelText);

	    data = new FormData();

	    data.top = new FormAttachment(0,

	    		convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN));

	    data.left = new FormAttachment(0,

	    		convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN));

	    variableNameLabel.setLayoutData(data);

	    // variable name field.  Attachments done after all widgets created.

	    variableNameField = new List(contents, SWT.SINGLE | SWT.BORDER);

	    String[] names = new String[missingNames.size()];

	    variableNameField.setItems((String[])this.missingNames.toArray(names));

	    data = new FormData();

	    data.left = new FormAttachment(0,

	    		convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN));

	    data.top = new FormAttachment(variableNameLabel,

	            convertVerticalDLUsToPixels(5));

        data = new FormData();

        data.left = new FormAttachment(variableNameLabel,

                convertHorizontalDLUsToPixels(5));

        data.top = new FormAttachment(variableNameLabel,

                convertVerticalDLUsToPixels(5), SWT.CENTER);

        variableNameField.setLayoutData(data);

	}

	/**

	 * Adds buttons to this dialog's button bar.

	 * 

	 * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar

	 */

	protected void createButtonsForButtonBar(Composite parent) {

	    okButton = createButton(parent, IDialogConstants.OK_ID,

	            IDialogConstants.OK_LABEL, true);

	    okButton.setEnabled(true);

	    createButton(parent, IDialogConstants.CANCEL_ID,

	            IDialogConstants.CANCEL_LABEL, false);

	}

}